c^2-2/10c-20

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Solution for c^2-2/10c-20 equation: 


c in (-oo:+oo)

c^2-((2/10)*c)-20 = 0

c^2+(-1/5)*c-20 = 0

c^2-1/5*c-20 = 0

DELTA = (-1/5)^2-(-20*1*4)

DELTA = 2001/25

DELTA > 0

c = ((2001/25)^(1/2)+1/5)/(1*2) or c = (1/5-(2001/25)^(1/2))/(1*2)

c = ((2001/25)^(1/2)+1/5)/2 or c = (1/5-(2001/25)^(1/2))/2

c in { (1/5-(2001/25)^(1/2))/2, ((2001/25)^(1/2)+1/5)/2 }

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